Hemiptera: Heteroptera: Lygaeoidea: Rhyparochromidae) Author(S): Luis Cervantes Peredo Source: Proceedings of the Entomological Society of Washington, 114(3):338-346
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A New Coleopteroid Genus of Lethaeini (Hemiptera: Heteroptera: Lygaeoidea: Rhyparochromidae) Author(s): Luis Cervantes Peredo Source: Proceedings of the Entomological Society of Washington, 114(3):338-346. 2012. Published By: Entomological Society of Washington DOI: http://dx.doi.org/10.4289/0013-8797.114.3.338 URL: http://www.bioone.org/doi/full/10.4289/0013-8797.114.3.338 BioOne (www.bioone.org) is a nonprofit, online aggregation of core research in the biological, ecological, and environmental sciences. BioOne provides a sustainable online platform for over 170 journals and books published by nonprofit societies, associations, museums, institutions, and presses. Your use of this PDF, the BioOne Web site, and all posted and associated content indicates your acceptance of BioOne’s Terms of Use, available at www.bioone.org/page/ terms_of_use. Usage of BioOne content is strictly limited to personal, educational, and non-commercial use. Commercial inquiries or rights and permissions requests should be directed to the individual publisher as copyright holder. BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, research libraries, and research funders in the common goal of maximizing access to critical research. PROC. ENTOMOL. SOC. WASH. 114(3), 2012, pp. 338–346 A NEW COLEOPTEROID GENUS OF LETHAEINI (HEMIPTERA: HETEROPTERA: LYGAEOIDEA: RHYPAROCHROMIDAE) LUIS CERVANTES PEREDO Instituto de Ecologia, A.C. Carretera Antigua a Coatepec # 351, 91070, Xalapa, Veracruz, Mexico (e-mail: [email protected]) Abstract.—Descriptions and illustrations of a new coleopteroid genus of Lethaeini are presented. The new genus Tuitocoris with one species, Tuitocoris brzoskai new species, is similar to the American genus Xestocoris and to the Australian Austro- xestus. Like some other coleopteroid Lethaeini, it has several modifications in the hemelytra and hind wings. Dorsal views of male, head, foreleg, mesothoracic scent gland, paramere, pygophore, spermatheca, and fifth instar nymph are illustrated. This species was found in an area of pine forest on the coast of the state of Jalisco, Mexico, which is known for the great number of endemic species of Heteroptera and some other groups of insects and plants, so it should be considered for conservation purposes. Key Words: Tuitocoris, Mexico, new species, endemic DOI: 10.4289/0013-8797.114.3.338 Members of Lethaeini are mainly there is a conspicuous trichobothrium distributed in the tropics and subtropics, present near each antero-lateral pronotal although a few species extend into either angle (Ashlock 1964). the Palearctic or Nearctic; they range Here, the new genus Tuitocoris is from small to medium size (2-10 mm), described based on one species Tuito- with a shining to subshining dorsal sur- coris brzoskai new species. This new face. They are separated from the other genus is similar to the Australian genus 13 Rhyparochromidae tribes recognized Austroxestus Woodward (Woodward by Henry (1997), by the following syn- 1962, 1979, 1981) and similar to the apomorphies: linear placement of tri- American genus Xestocoris Van Duzee chobothria on abdominal sternum V, (O’Donnell 2007, Cervantes and Brailovsky loss of y-chromosome, extreme modifi- 2008). Illustration of the adult habitus, cation of the sperm reservoir, and develo- head, foreleg, scent gland, male and fe- pment of iridescent areas on the head male genitalia, and fifth instar habitus (Slater and O’Donnell 1978, O’Donnell nymph are included. 1991). Nymphs lack a Y-suture, but have The El Tuito area has been recognized lateral evaporative areas. In most genera, by several authors (Garcia Aldrete 1996, Brailovsky and Barrera 2001, Espinosa et al. 2006) as an important zone for the * Edited by Thomas J. Henry; accepted by Michael presence of endemic insect and plant spe- W. Gates cies. This new genus constitutes another VOLUME 114, NUMBER 3 339 endemic for this area. El Tuito is a very spines closer to the distal end, arranged peculiar zone in which temperate and all on a straight line (Fig. 3). Eyes tropical environments mix, generating without trichobothria. Lateral pronotal a great and unique diversity that should margins only slightly carinate on ante- be conserved. rior half, with trichobothria on anterior third; pronotal collar only visible ven- MATERIALS AND METHODS trally and delimited by a line of punc- Specimens were collected on the tures; posterior margin of pronotum coastal area in the state of Jalisco, slightly concave; pronotum and scutel- Mexico. The area is called El Tuito and lum with scattered small punctures and is situated at 20° 21’16’’ N and 105° setae directed backward (Fig. 1). Scent 18’59’’ W, at an elevation of 731 m. The gland peritreme long, narrow and primetypeofvegetationispineandoak slightly curved at the apex (Fig. 7). forest with some tropical elements due to Clavus and corium with large punctures its proximity to the coast. with setae directed backward. Hemelytra Specimens are deposited in the fol- reduced without membrane, leaving at lowing institutions: Coleccion del Insti- least three abdominal segments exposed tuto de Ecologia, A. C. in Xalapa, (Fig. 1). Spermatheca mushroom-shaped, Veracruz, Mexico (IEXA); Coleccion with bulb sitting directly on duct (Fig. Nacional de Insectos del Instituto de 4). Paramere with blade very wide, ta- Biologia, UNAM, Mexico City (CNIN); pering to a blunt point, shank broad (Fig. 5). National Museum of Natural History, Etymology.—The name refers to the Smithsonian Institution, Washington, D. type locality. C., USA (USNM); University of Con- Distribution.—Known only from the necticut, Storrs, USA (UCMS); and The coast of Jalisco. Natural History Museum, London, England Discussion.—Tuitocoris new genus, (BMNH). Specimens were compared is very similar to the genus Xestocoris with specimens from all the other Leth- although Tuitocoris is much larger. The aeini genera deposited in CNIN and they forefemur in Tuitocoris (Fig. 3) has three run in O’Donnell (1986) key to the genus long spines located mesally and three Xestocoris Van Duzee, although differs small spines closer to the distal end, ar- by several characters, see discussion be- ranged in a straight line, while in Xes- low. Individuals were examined using tocoris the forefemur has only two to a Leica MZ8 dissecting microscope, four small spines. Tuitocoris lacks the measurements were made with an ocular characteristic eye trichobothria of Xes- micrometer, and drawings were elabo- tocoris. The scent gland opening of rated with the aid of camara lucida; all Tuitocoris (Fig. 7) is long and straight ± measurements are given in mm s.e. and slightly curved apically, whereas in Xestocoris it is usually rounded (Fig. 8). Tuitocoris Cervantes, new genus Male and female genitalia in both genera (Figs. 1–7) are very similar, as well as the presence Diagnosis.—Head with two basal iri- of two iridescent patches, located dorso- descent spots dorsally composed of posteriorly on head (Fig. 2). pegs; with two trichobothria located in Although both genera have tibial front of eyes; forefemur with three long spines and are coleopteroid, Tuitocoris dif- spines located mesally and three small fers from the Australian genus Austroxestus 340 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON Fig. 1. Dorsal view of Tuitocoris brzoskai new species (Holotype, male). VOLUME 114, NUMBER 3 341 342 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON Figs. 2–9. 2–7, Tuitocoris brzoskai new species. 2. Head, showing position of the iridescent spots. 3. Foreleg. 4. Spermatheca, showing dilated area. 5. Paramere. 6. Male genital capsule. 7. Scent gland peritreme. 8. Scent gland peritreme of Xestocoris clavatus Cervantes & Brailovsky. 9. Scent gland peritreme of Austroxestus carnarvoni Woodward (Fig. 9 taken from Woodward 1962). (Woodward 1979, 1981) by the absence Tuitocoris brzoskai Cervantes, of hemelytral membrane, the lack of new species a dilated area between bulb and proximal (Figs. 1–7) flange of the female spermatheca; and Diagnosis.—This species can be dif- the long scent-gland peritreme (Fig. 7) ferentiated from other new world species rather than a short peritreme as in Austro- in the Lethaeini which have two irides- xestus (Fig. 9). cent spots located dorsally on base of VOLUME 114, NUMBER 3 343 head (Fig. 2) by the presence in the Female spermatheca without a dilated forefemur of three long spines located area between bulb and proximal flange medially and three small spines closer to (Fig. 4). the distal end, arranged all on a straight Genital capsule of males with a round line. Head and pronotum shining with opening that stretches slightly toward the small punctures located in the area between apex (Fig. 6). Parameres with wide blade, eyes and tylus, on the anterior margin and narrowing to a blunt point; shank broad on the posterior third of pronotum. (Fig. 5). Coloration.—Head, pronotum, visible Female measurements (n = 8). Body dorsal segments of abdomen, and ven- length 4.28 ± 0.1; head length 0.52 ± 0.05; ter shining reddish brown; hemelytra width through eyes 0.84 ± 0.02; inter- ochraceous; antennae, rostrum, and legs ocular distance 0.51 ± 0.01; preocular amber. Head and pronotum shining. distance 0.31 ± 0.02; antennal segment Scutellum and hemelytra slightly dull, lengths: I 0.43 ± 0.02, II 0.76 ± 0.04, III with large and regularly distributed punc- 0.62 ± 0.03, IV 0.6 ± 0.02; rostral segment tures, those of hemelytra larger. Small lengths: I 0.55 ± 0.04, II 0.59 ± 0.03, III silvery hairs raising from each puncture. 0.52 ± 0.02, IV 0.35 ± 0; pronotum: Head.—Head declivitous; tylus broader length 0.82 ± 0.01, width across anterior thanfirstantennalsegment;ocellilocated margin 0.86 ± 0.04, width across humeral very near base of head and close to the angles 1.4 ± 0.06; scutellum: length eyes by a distance smaller than width of 0.87 ± 0.05, width 0.88 ± 0.02; foreleg: first antennal segment; eyes with three to femur length 0.92 ± 0.02, tibia length four small setae and a long setae just in 0.9 ± 0.02, tarsomere lengths: I 0.3 ± 0.02, front of eyes; rostrum reaching metacoxae.